Loader to convert single-fire boltloading firearms to repeaters

ABSTRACT

A CONVERSION, MAGAZINE-ADAPTOR FOR USE ON BOLTOPERATED, SINGLE SHOT FIREARMS IN WHICH ONE OR MORE SUPPLEMENTAL ROUNDS ARE GRAVITY-FED TO AN OPENING RECEIVER ON THE FIREARM AFTER A SPENT CARTRIDGE CASE IS EJECTED DUE TO BOLT ACTUATION, NOVEL SUPPLEMENTAL MAGAZINE OVERLYING THE UPWARDLY OPENING RECEIVER AND INCLUDING DUAL ACTING SPRING MEANS FOR AUTOMATICALLY GRAVITY DISPERSING FRESH CARTRIDGES INTO A RECEIVER OF A SINGLE SHOT FIRE ARM TO CONVERT IT INTO A REPEATER TYPE.

H. M. OROZCO 3,564,747 LOADER TO CONVERT SINGLEFIRE BOLT-LOADINGFIREARMS T0 REPEATERS Feb. 23, 1971 I5 Sheets-Sheet 1 Filed Oct. 8, 1968INVENTOR HEcToR MENDOZA- 0R0Zo Feb. 23,- 1971 H. M. OROZCO 3,564,747

' LOADER To CONVERT SINGLE-FIRE BOLT-LOADING FIREARMS To BEPEATERS FiledOct. 8, 1968 3 Sheets-Sheet 2 INVENTOR H EcTaR MENDOZA okozco MMM OROZCO3, 7 SINGLE-F E T-LOADING EARMS TO REP E H. M LOADER TO CONV FIR ERTFeb. 23,1971

3 Sheets-Sheet 3 Filed Oct- 8. 1968 IMVENTOR HEcTaR MENDOZA a ROZCO g xi 6 I A t-Q15.

United States Patent 3,564,747 LOADER TO CONVERT SINGLE-FIRE BOLT-LOADING FIREARMS TO REPEATERS Hector Mendoza ()rozco, Bartolache 1914,Mexico City 21, Mexico Filed Oct. 8, 1968, Ser. No. 776,297 Int. Cl.F41e 25/02, 25/00 US. Cl. 42-18 Claims ABSTRACT OF THE DISCLOSUREBACKGROUND OF THE INVENTION The present invention relates generally toapplicants United States Letters Patent 3,394,481, issued July 30, 1968,and titled Adapator for Converting a Single Shot Firearm Into a Two ShotRepeater.

The present invention fulfills an unsatisfied demand for an effectiveand inexpensive conversion attachment for converting single shotfirearms to the repeater type.

SUMMARY OF THE INVENTION It is therefore the main object of thisinvention to supply an attachment with a very simple mechanism, and witha low production cost, that will allow converting a single-shot firearminto a repeater, as long as the firearm is actuated by means of a boltmechanism.

Another object that is of no less importance than the above and which issought by means of this invention, lies in providing an attachment ofthis sort that makes use of the force of gravity for the rapidreplacement of the spent cartridge with a live one within the firingchamber of the barrel of the firearm, but in such a way as to main tainmechanical control over the replacement, which is what makes theattachment properly a loader for two shots or more.

In fact, were there no such control over the force of gravity, such aswas the case of the previously proposed solutions, including the onethat motivated the previous request for a patent as mentioned above, theattachment could only serve to hold one cartridge in addition to the onein the chamber, thus doubling the fire power of the firearm. Theplacement of more than one cartridge in said attachment meant that allwould drop out at the same time under the force of gravity, and sincethe chamber could obviously receive only one, the rest would fall awayfrom the firearm.

In order to achieve the objectives being pursued, then, the presentinvention is intended to provide an attachment to load single-firebolt-loading firearms, or in other words, a loader, for several livecartridges, that can be easily adapted to the part of the barrel knownas the breech or receiver mechanism, employing mechanical means tocontrol the delivery of the cartridges from the loader. This is achievedby use of the force of gravity once the breech is opened and emptied bythe action of the bolt and in such a way that the cartridges aredelivered one by one with the delivery of each one corresponding to oneoperating cycle of the bolt.

BRIEF DESCRIPTION OF THE DRAWINGS The nature of the invention, will bemore easily understood when it is considered in conjunction with theaccompanying drawings wherein:

FIG. 1 is a perspective view of an improved loading attachment accordingto the invention, partially broken away for purposes of clarity;

FIG. 2 is a perspective view showing the attachment of FIG. 1 mounted inan operative position on the barrel of a firearm, adjacent the breech orreceiver thereof;

FIGS. 3 and 4 are perspective views taken respectively from the side andtop of a portion of the barrel of a firearm upon which the attachment ofthe invention has been mounted, showing a modified embodiment of theinvention;

FIGS. 5, 6 and 8 are perspective views of slightly modified loadingattachments, incorporating a control spring similar to that of theembodiment of FIGS. 3 and 4, and illustrating modified cartridgemagazines; and

FIG. 7 is a perspective view of the control spring used in theembodiments of FIGS. 36 and 8.

With regard to the above mentioned FIGS. 1 and 2 showing the firstmodality of the invention, the improved loading attachment includes aclamp 10, made preferably of cold-stamped steel sheet to provide themost suitable form for attachment to the receiver 11 of the boltmechanism of the firearm. The clamp is provided with drill holes 13 forits rigid attachment to said receiver 11 of the bolt mechanism by meansof a. screw. The upper portion of this clamp becomes the magazine orstorage 14 for the cartridges, and it is provided with the usual slot 16in the rear portion to facilitate cartridge placement.

The control device, then, for delivering the cartridges one by one asthe bolt mechanism 12 is actuated in its customary reciprocatory motion,in this first modality of the invention, consists of a dual action leafspring with the first upper portion 17 bent inwardly at a right angleand with the end out along a straight line. A second lower portion 18 isalso bent inwardly at a right angle, but the end is cut diagonally at19, both vertically and horizontally. These two bent portions 17 and 18are the teeth of the dual action control device, with a common springaction. The rest of the spring, which would be the back 20, continuesdownward in a partial clamp 21, which coincides or generally overlapsthe clamp 10 of the magazine 14 of the loader and is attached togetherwith it and by means of the same screws to the receiver of the firearm,through holes 22.

As will easily be seen, the operation of the control device for thedelivery of the cartridges 15 from the loader magazine 14, is obtainedin combination with the back and forth motion of the bolt 12. As thebolt is moved forward, it engages the lower tooth of the spring ondiagonal cut 19 of portion 18, displacing the tooth outwardly. Thismovement is transmitted to the upper tooth 17 by means of the back 20,so that this upper tooth, which normally extends into the magazine 14through slot 23, is displaced outwardly of slot 23. Thus the lowermostcartridge stored in the magazine gravitates downwardly as soon as itovercomes its inertia. Proceeding in this manner, when the bolt 12 isdrawn backward after the shot, or stated otherwise. when the receiver ofthe firearm is opened and the spent cartridge case is expelled by theejector 24 so that the breech is again free, the lowermost of the storedcartridges drops at once into the receiver. At this same instant, whenit is no longer opposed by the withdrawn bolt, the lower tooth 18 of thecontrol spring recovers its original positin within the receiver andalso draws upper tooth 17 back to its original position within themagazine of the loader, thus introducing an obstacle so that theremaining cartridges press against the now lowermost cartridge thatreplaced the cartridge that dropped into the receiver chamber to takethe place of the spent cartridge, and at the same time they exert adownward pressure on it. It should be noted that said lower tooth 18 ofthe control spring acts through slot 25 in magazine 14 in the placementof the cartridges 15. This slot coincides with a lateral notch 25'opening into the portion of the barrel that we have referred to asreceiver 11 for the bolt mechanism 12.

In the modality illustrated in FIGS. 3, 4, 5, 6, 7 and 8 (primedreference numerals will be used to indicate similarly functioningstructure), the control device or escapement that regulates the passageor delivery of the cartridges 15 from the magazines of the loaders, issubstantially equivalent in construction and operation to the device inthe modality shown in FIGS. 1 and 2. It differs, however, in theconstruction of the dual action spring, instead of being of suitablystamped sheet, is made of wire with the bends necessary to conform toupper tooth 17 and lower tooth 18. This wire elements is provided withan extension 26 so as to allow its being held under due pressure betweenthe loader magazines 14'14 and the receiver 11 of the bolt mechanism 12.

In the same modality to which we now refer, it would be feasible to haveclamp elements 10' that attach magazines 14'14 of the loader to receiver11 of the bolt mechanism 12 made of a simple metal band, preferably ofsteel and further provided with drill hole 13' for the correspondingscrew.

It also seems worthwhile pointing out that in any of the modalities ofthe control device for the delivery or release of the cartridges fromthe loader of the magazine to the receiver of the bore of the barrel ofthe firearm, ditferent design forms are feasible for specific purposesin holding the cartridges within the magazine. Thus, the design shown inFIG. 1 could be used, where the forward part of the magazine iscompletely rounded and there is a single slot 16 in the rear, or thedesign shown in FIG. where the forward portion of the magazine isrounded and the rear portion is closed, or the design shown in FIG. 6,where the forward portion of the magazine is rounded with a largeportion 27 cut back, or the design shown in FIG. 8, where the forwardpart of the magazine is rounded with a portion 27' cut back at an angleand the rear is complete, but on the other hand the side walls have beenprovided with entrance openings 28.

Finally, it should be indicated that the details that have beendescribed and illustrated correspond to the practice of improvements inthe invention that are in keeping with what would be preferable, but byno means do these set the limits of this invention, which will bedefined in the justification set forth in the following claims.

What is claimed is: 1. A firearm repeater loader for converting singleshot firearms having an operating bolt and an upwardly opening cartridgereceiver, comprising:

a member having means for mounting the same on a firearm adjacent thecartridge receiver thereof,

said member including a loader magazine for containing at least onesupplemental cartridge oriented in the general position for manualinsertion of a cartridge into said receiver,

said loader magazine including displaceable abutment means normallyextending into said loader magazine for retaining a cartridge thereaboveand against gravi- 4 tational descent from said loader magazine intosaid receiver,

said abutment means including a first portion engageable by theoperating bolt when operated for dispensing a cartridge into saidreceiver,

said abutment means including a second portion spaced from said firstmentioned portion and operatively connected thereto for permitting thegravitational release of subsequent cartridges to a lowermost,dispensing position in said loader magazine.

2. The structure as claimed in claim 1, in which said abutment meanscomprises a dual action spring, said first and second portionscomprising teeth extendin into said loader magazine, the lowermost ofsaid teeth including an oblique edge portion normally disposed in thepath of movement of the operating bolt of the firearm, said teeth beingdisplaceable out of said loader magazine when a cartridge case isejected from the firearm.

3. The structure as claimed in claim 2, in which said dual acting springcomprises a leaf spring and said teeth are integral portions thereofextending generally at right angles into said loader magazine from aback portion of said leaf spring.

4. The structure as claimed in claim 3. in which said loader magazinecomprises a receptacle for receiving at least one cartridge therein,said receptacle including a lower depending portion for mountedengagement with the lower portion of the receiver of a firearm, saidback portion of said dual acting spring including a depending mountingportion generally overlying said mounting portion of the loadermagazine.

5. The structure as claimed in claim 2, in which said dual action springcomprises a wire element, said teeth being skeletonized and defined byupper and lower bent portions of said wire element.

6. The structure claimed in claim 5, in which said wire element includesan elongated projection which will be disposed adjacent the outersurface of the receiver upon which the loader attachment is mounted.

7. The structure as claimed in claim 1, in which said loader magazinecomprises an upwardly opening receptacle for manually receivingcartridges therein.

8. The structure as claimed in claim 7, in which said receptacleincludes a rearwardly opening slot portion for permitting manualinsertion of cartridges therein.

9. The structure as claimed in claim 7, in which said upwardly openingreceptacle includes closed forward and rear wall portions.

10. The structure as claimed in claim 7, in which said upwardly openingreceptacle includes a skeletonized forward portion for visuallyascertaining the number of cartridges disposed in said upwardly openingreceptacle.

References Cited UNITED STATES PATENTS 383,895 6/1888 Mauser 4218386,659 7/1888 Salenius 4218 (.1) 3,394,481 7/1968 Orozco 42l7 BENJAMINA. BORCHELT, Primary Examiner C. T. JORDAN, Assistant Examiner U.S. Cl.X.R. 42-50

